Gosky 5-Position 1.25inch Manual Filter Wheel/Revolver for Astronomical Telescope - Standard Fitting Just rotate the wheel and the selected filter rotate into place quickly and easily. Change filters without removing your telescope eyepiece or astrophotography camera. Up to 5-position, Standand 1.25 Threads crafted well for a variety of different brand filters. Easy to use -just attached to your focuser either by the supplied 1.25" nosepiece adaptor or via a T-thread. Protects astrophotography filters from dust, dirt, and impact, and keeps them ready for action. Fully sturdy aluminum constructed- suitable for heavy cameras.